渗流作用下浅埋盾构下穿河涌研究  

Research on Shallow-buried Shield Undercrossing the River under the Action of Seepage

作　　者：黄德钦 HUANG Deqin(China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Guangzhou 511400,Guangdong,China)

机构地区：[1]中铁大桥勘测设计院集团有限公司,广东广州511400

出　　处：《工程技术研究》2024年第14期38-41,共4页Engineering and Technological Research

摘　　要：文章选取位于某城市的地铁盾构隧道近距离穿越河流施工作为案例,运用数值模拟技术构建其三维动态盾构隧道施工有限元计算模型,开展浅埋隧道跨越河流时的重力场效应、应力-渗透耦合场及瞬时降雨的影响等方面的比较分析。结果表明,对应力-渗流耦合场模型而言,其变形规律随着盾构穿越河涌长度而越来越贴近实际变形,说明浅埋隧道下穿河涌应考虑渗流应力场对盾构掘进的影响。The construction of a subway shield tunnel crossing a river with short distance in a city is selected as the case.The finite element calculation model of three-dimensional dynamic shield tunnel construction is constructed by numerical simulation technology.The gravityfield effect,stress-permeability couplingfield and instantaneous rainfall influence of shallow-buried tunnel crossing the river are compared and analyzed.The results show that the deformation law of the stress-seepage coupling field model is closer to the actual deformation with the length of the shield crossing the river,indicating that the influence of the seepage stressfield on the shield tunneling should be considered when the shallow-buried tunnel undercrossing the river.

关 键 词：浅埋盾构隧道 渗流-应力耦合 沉降分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]